Journal
PHYSICS LETTERS A
Volume 374, Issue 5, Pages 739-743Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2009.11.070
Keywords
Semiconductor ring laser; Excitability; Fluctuations; Nonlinear dynamics; Stochastic dynamics
Categories
Funding
- European Union [IST-2005-34743]
- Research Foundation - Flanders
- Belgian Science Policy Office [IAP-V110]
- FWO
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We report theoretically and experimentally on excitability in semiconductor ring lasers in order to reveal a mechanism of excitability, general for systems close to Z(2)-symmetry. The global shapes of the invariant manifolds of a saddle in the vicinity of a homoclinic loop determine the origin of excitability and the features of the excitable Pulses. We show how to experimentally make a semiconductor ring laser excitable by breaking the Z(2)-symmetry in a controlled way. The experiments confirm the theoretical predictions. (C) 2009 Elsevier B.V. All rights reserved.
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